<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../jquery-3.2.1.min.js"></script>
    <script src="work1.js"></script>
</head>
<body>
    <select id="province"></select>
    <select id="cities"></select>
</body>
</html>